#!/bin/bash
#
# Slackware build script for OpenBLAS
# Written by Mário Antunes (mariolpantunes@gmail.com)

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM="OpenBLAS"
VERSION=${VERSION:-0.3.12}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

PREFIX=${PREFIX:-/usr}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi
EXTRAPARMS=""
if [ "x`uname -p|grep QEMU|wc -l`" = "x1" ]; then
  #we are running in a vm with a QEMU cpu. OpenBLAS does not like this
  EXTRAPARMS="DYNAMIC_ARCH=1"
  if [ "x$TARGET" = "x" ]; then
    echo "the cpu is not recognised by OpenBLAS. specify a target cpu"
    echo "using variable TARGET=targetname"
    echo "look at TargetList.txt in the source for valid TARGET types."
    exit 2
  else
    EXTRAPARMS=$EXTRAPARMS" TARGET="$TARGET
  fi
fi
# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "x86_64" ]; then
    LIBDIRSUFFIX="64"
else
    LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

make $EXTRAPARMS \
  DYNAMIC_ARCH=1 \
  TARGET=GENERIC \
  NO_STATIC=1 \
  NO_AFFINITY=1 \
  BUILD_RELAPACK=1 \
  DESTDIR=$PKG \
  PREFIX=$PREFIX \
  OPENBLAS_LIBRARY_DIR=$PREFIX/lib$LIBDIRSUFFIX
make \
  $EXTRAPARMS \
  DYNAMIC_ARCH=1 \
  TARGET=GENERIC \
  NO_STATIC=1 \
  NO_AFFINITY=1 \
  BUILD_RELAPACK=1 \
  DESTDIR=$PKG \
  PREFIX=$PREFIX \
  OPENBLAS_LIBRARY_DIR=$PREFIX/lib$LIBDIRSUFFIX \
  install

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

rmdir $PKG$PREFIX/bin

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  BACKERS.md CONTRIBUTORS.md Changelog.txt LICENSE README.md \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
